Teachers are mostly Snowflakes and morons, so no, don't arm that assortment of neurotic commies and deviants.
Some cities are already doing the best thing, which is make schools the local police stations; almost all schools have the space for a local police 'community' station, no need for the patrol officers to have to go downtown or wherever when they can just report directly to their local community station, which all depts. have now already; several police cars in the lot, along with officers around 24/7, is a very good deterrent, and costs nothing extra for taxpayers to boot.
Already been at least two threads on this in the CDZ. Merge this with those.